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BIOL 3300 Vertebrate Zoology: Ectotherms - Herpetology

BIOL 3300 Vertebrate Zoology: Ectotherms - Herpetology. http://www.amphibian.com.au/. How do they work ?. Q 10 How are Heat, H 2 O and metabolism linked?. How is H 2 O gained/lost ?. Observe Agalychnis annae in the vivarium … How are these animals gaining/losing water ?.

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BIOL 3300 Vertebrate Zoology: Ectotherms - Herpetology

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  1. BIOL 3300 Vertebrate Zoology: Ectotherms - Herpetology http://www.amphibian.com.au/

  2. How do they work? • Q10 • How are Heat, H2O and metabolism linked?

  3. How is H2O gained/lost? • Observe Agalychnisannaein the vivarium… How are these animals gaining/losing water? What behaviors or adaptations are they exhibiting to influence rates?

  4. How is H2O gained/lost?

  5. What are the 3 sources of H2O? • Liquid = • Preformed (Molecular) = • Metabolic =

  6. Methods for obtaining H2O? • Thorny Devil (Moloch horridus) http://digimorph.org/specimens/moloch_horridus/whole/ http://cmuarch2013.wordpress.com/2009/02/04/tom-wiscombe-lecture-notes/

  7. Methods for obtaining H2O? • Peringuey’s viper (Bitis peringueyi) http://www.lonelyplanetimages.com/search/125101?keywords=crawl http://www.flickr.com/photos/hamschtr/3959581417/

  8. Methods for obtaining H2O? • Desert Tortoise (Gopherus agassizii) http://www.rightpet.com/ReptileDetail/desert-tortoise http://www.basinandrangewatch.org/TortoiseTranslocation.html

  9. Methods for obtaining H2O? • Great Basin Spadefoot (Spea intemontana) Bladder bingers Urine = Plasma = Urine = Plasma =

  10. Fresh H2O Flux! • Amphibian plasma • Fresh H2O • What is the consequence of this on water volume? • What about salt content?

  11. Salt H2O Sucks! • <100 species of amphibians can tolerate salt water (sea H2O > • Amphibian can elevate plasma and muscle osmolality to ~ • How? http://kidstvmovies.about.com/od/oceans/ig/Oceans-Photo-Gallery/Marine-Iguana.htm Amblyrhynchus cristatus How about marine iguanas?

  12. Molecular (preformed) H2O! • What is the H2O content of herpetofauna food?

  13. Molecular (preformed) H2O! • What is the H2O content of herpetofauna food? Sauromalus obesus

  14. Metabolic H2O! • What is the chemical (metabolic) quantity of H2O of herpetofauna food? • 1g starch = • 1g fat = • 1g protein = http://www.biolib.cz/en/taxonimage/id24436/?taxonid=177

  15. How is H2O lost?

  16. Minimizing H2O loss! Life in Cold Blood27 minutes 1st episode Phyllomedusa sauvagii http://www.youtube.com/watch?v=Ce8a5bFQexA&feature=fvw

  17. Minimizing H2O loss! Neobatrachus sp. http://www.abc.net.au/wa/stories/s1656813.htm

  18. Minimizing H2O loss! • 2 NH3 +2 ATP -> CH4ON2 • C5H4O3N4 Cloaca

  19. How is Salt lost?

  20. How is H2O maintained? • Short-term water balance • Ex. Canopy frogsZetek’s Bromeliad Frog (Isthmohyla zeteki)

  21. How is H2O maintained? • Long-term water balance

  22. How is H2O maintained? • Long-term water balance

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